One of the chemicals used in this experiment is SnCl2 (aq). What is its name?

Answer:

neither

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transcription

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Explanation:

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Answer:

Two DNA molecules result from one original molecule:  

✔ neither

Amino acids are linked together at ribosomes:  

✔ translation

RNA base sequences complementary to those in DNA are built:

✔ transcription

Complementary tRNA bases match up to mRNA bases:  

✔ translation

(Photo for proof at the bottom.)

Explanation:

Transcription is where the DNA sequence is replicated onto an RNA strand. The strand of RNA that is replicated has bases that are complementary to the bases on the DNA strand being replicated.

Translation is where the RNA, or mRNA, is transported to the cytoplasm where tRNA bases match with 3 RNA bases, and produces proteins in the process.

Here's a photo of Edge incase you're doubtful.

The amount of heat absorbed when 182.7 g of Fe3O4 decomposes into Fe and O2 is 885.6 kJ.

The given chemical equation shows that the decomposition of 1 mole of Fe3O4 releases 1120.5 kJ of heat energy. To find the amount of heat absorbed when 182.7 g of Fe3O4 decomposes, we first need to determine the number of moles of Fe3O4 present.

The molar mass of Fe3O4 is:

(3 x atomic mass of Fe) + (4 x atomic mass of O) = (3 x 55.85 g/mol) + (4 x 16.00 g/mol) = 231.53 g/mol

The number of moles of Fe3O4 is:

182.7 g / 231.53 g/mol = 0.7894 mol

Now, we can use stoichiometry to calculate the amount of heat absorbed:

0.7894 mol Fe3O4 x (1120.5 kJ / 1 mol Fe3O4) = 885.6 kJ

Decomposition is a type of chemical reaction in which a single compound breaks down into two or more simpler substances. This reaction can occur through various processes, such as heating, exposure to light, or addition of a catalyst.

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Answer:

413,000 grams

Explanation:

Answer:

413,000

Explanation: That's because 1 kg equals to 1,000 grams.

Answer:

The radiation of the Sun's electromagnetic waves

Explanation:

Earth's atmosphere keeps much of the Sun's energy from escaping into space. This process, called the greenhouse effect, keeps the planet warm enough for life to exist.

Using this formula, we can calculate the confidence interval once we have the sample data, without the sample data, it is not possible to provide an accurate confidence interval estimate.

To construct a 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system, we would need the sample data, specifically the number of cell phone users and the number of users who developed cancer. Without the sample data, it is not possible to provide an accurate confidence interval estimate.

However, if we assume that we have the necessary sample data, we can proceed with the calculation. The formula for calculating a confidence interval for a proportion is:

Confidence interval

\(=�^±�×�^(1−�^)�Confidence interval= p^​ ±z× np^​ (1− p^​ )​ ​ where:�^p^​\)

 is the sample proportion (number of users with cancer divided by the total number of cell phone users).

\(�\)

z is the z-score corresponding to the desired confidence level (90% confidence level corresponds to a z-score of approximately 1.645).

\(�\)

n is the sample size (total number of cell phone users).

Using this formula, we can calculate the confidence interval once we have the sample data.

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Answer: Composition is an orderly arrangement of visual structures (elements and principles) to create a mood, add meaning and direct the viewers' attention to the purpose of the artwork. Compositions are said to be 'designed' according to the specific intent of the artist.

The statement that describes the Arrhenius interpretation of acids and bases is that it is limited to situations that involve aqueous solutions or specific compounds. Therefore, option D is correct.

Arrhenius's interpretation defined an acid as a substance that increases the concentration of hydrogen ions (H⁺) when dissolved in water and a base as a substance that increases the concentration of hydroxide ions (OH⁻) when dissolved in water.

According to Arrhenius's interpretation, when an acid is dissolved in water, it releases H⁺ ions, which then react with water molecules to form H₃O⁺ ions, also known as hydronium ions.

Similarly, when a base is dissolved in water, it releases OH⁻ ions, which then react with water molecules to form H₂O molecules and more OH⁻ ions. Thus, option D is correct.

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Answer:

ELEMENTS

Explanation:

CUZ AN A

ELEMENT IS A GROUP OF ATOMS THAT CANNOT BE BROKEN DOWN BY ANY CHEMICAL OR PHYSICAL MEAN

Answer:

50 metres per second.

Explanation:

Speed is the total distance covered divided by the time taken to cover that distance. Therefore, the plane's speed is obtained by dividing 450,000 metres by 9000 seconds, resulting in a speed of 50m/s.

At over 1700 miles thick the lower mantle contains superheated rocks and minerals.

The mantle is the mostly-solid bulk of Earth's interior. The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust.

As Earth began to take shape about 4.5 billion years ago, iron and nickel quickly separated from other rocks and minerals to form the core of the new planet. The molten material that surrounded the core was the early mantle.

The lower mantle extends from about 660 kilometers (410 miles) to about 2,700 kilometers (1,678 miles) beneath Earth’s surface. The lower mantle is hotter and denser than the upper mantle and transition zone.

Therefore, at over 1700 miles thick the lower mantle contains superheated rocks and minerals.

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the use of NaOH solution in extraction procedures can help to adjust the pH of the solution, enhance the solubility of organic compounds in the aqueous layer, and help to separate different compounds based on their relative solubilities.

NaOH (sodium hydroxide) solution is often used in extraction procedures to adjust the pH of the solution and to make the organic compounds more soluble in the aqueous layer.

When an organic compound is mixed with water, it may dissolve partially or not at all due to differences in polarity between the two substances. By adjusting the pH of the solution with NaOH, the organic compounds can become more soluble in the aqueous layer because the addition of a basic solution can convert acidic functional groups in the organic compound to their conjugate bases. For example, carboxylic acids (an acidic functional group commonly found in organic compounds) can be converted to their water-soluble carboxylate salt forms by the addition of a basic solution such as NaOH.

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Answer:

The correct answer is quantitative data.

Explanation:

The value of data in the form of numbers of counts where each set of data exhibits a specific numerical value associated with it is termed as quantitative data. This information refers to any quantifiable knowledge, which can be used for statistical analysis and mathematical calculations so that decisions of real-life can be taken based on the mathematical outcomes. The quantitative data is used to find the solutions of the queries like how often, how much, or how many.  

In the given case, a botanist measured the growth of the plant for two weeks, and the outcome came in the form of numerical value. Thus, the knowledge she collected is known as quantitative data.  

The descending order of carbon-carbon bond length in C₂H₆, C₂H₄, and C₂H₂ is:-

C₂H₆, C₂H₄, C₂H₂

Hydrocarbons are compounds that consist of only hydrogen and carbon.

On the basis of the presence or absence of double bonds/triple bonds, they are of three types- alkanes, alkenes, and alkynes.

The comparison between alkanes, alkenes, and alkynes is given in the adjoining image.

We can see that the bond length in alkanes like C₂H₆ is 1.53 A which is greater than alkenes(C₂H₄) , 1.33 A which is still greater than alkynes(C₂H₂) with a value of 1.18 A.

Thus, The descending order of carbon-carbon bond length in C₂H₆, C₂H₄, and C₂H₂ is:

C₂H₆, C₂H₄, C₂H₂

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Radioisotopes are unstable because they contain an excess number of Neutrons. A radioactive isotope called a radioisotope has an unstable nucleus and too much nuclear energy.

A radioactive isotope called a radioisotope has an unstable nucleus and too much nuclear energy. Radioisotopes are employed in medical research, therapy, and diagnosis. Radioactive chemical tracers that generate positrons or gamma rays can offer diagnostic data on the interior structure and operation of certain organs, such as the human brain.

An element that has a radioactive form made up of atoms having unstable nuclei that experience radioactivity to stable forms, producing distinctive alpha, beta, and gamma radiation. Radioisotopes are unstable because they contain an excess number of Neutrons.

Therefore, radioisotopes are unstable because they contain an excess number of Neutrons.

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To raise the temperature of a 10.35g sample of carbon tetrachloride from 32.1°c to 56.4°c, 222.92J heat is required.

Heat is a form of energy and it is associated with the motion of particles. The amount of heat required to change the temperature of a substance depends on its mass, the specific heat capacity of the substance and the change in temperature.

The mass of carbon tetrachloride is given as 10.35g. The specific heat capacity of carbon tetrachloride is given as 0.85651 J/g°C and the change in temperature is given as 24.3°C. Putting these values into the formula: q = m × C × ΔTq = 10.35 g × 0.85651 J/g°C × 24.3°Cq = 222.92 J. Therefore, 222.92 Joules of heat are required to raise the temperature of a 10.35g sample of carbon tetrachloride from 32.1°c to 56.4°c.

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Answer:

In an air compressor, a rotor spins, causing a piston to move up and down. When the piston goes down, freestanding air is pulled into a chamber. Then, the air is compressed and forced back outward as the piston rises back up.

Explanation:

Dependent variables could be height, number of leaves, biomass, etc. The constants could be the amount of water fed to the plants and other environmental conditions apart from the temperature.

Experimental variables could be independent, dependent, or constant.

Independent variables are supplied by the researcher and are often varied or manipulated to produce different effects on experimental systems or subjects.

Dependent variables are measured. Their values are often affected by whatever independent variable the researcher supplies.

Constant variables are uniform throughout the experimental groups or subjects.

Thus, in this case, the aim is to test the effect of temperature on the growth of a plant. The independent variable is the different temperatures.

The dependent variable would be any feature of the experimental plants that indicate growth. It could the height, the number of leaves, etc.

The constant variable would be other conditions the experimental plants are subjected to.

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The correct statement about the effect of substituent of an O atom is c)the resonance effect of O is greater than its inductive effect.So,correct option is c.

In science, resonance, likewise called mesomerism, is an approach to portraying holding in specific particles or polyatomic particles by the blend of a few contributing designs (or forms,[1] additionally differently known as reverberation structures or sanctioned structures) into a reverberation half and half (or mixture structure) in valence bond hypothesis. It has specific incentive for dissecting delocalized electrons where the holding can't be communicated by one single Lewis structure.

Due to resonance effect the extremity prompted in an O atom  by the connection of a solitary sets of electrons with a pi bond or the collaboration of two pi bonds in neighboring molecules shared with the R atom.

Hence,correct option is c.

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(Complete question) is:

Select all the statements that correctly describe the effect of a substituent in which an O atom directly attached to a benzene ring, such as OH or OR

a)O is able to release electrons by resonance because it has unshared electrons

b)the O releases electron density to the ring by resonance

c)the resonance effect of O is greater than its inductive effect

d)none of the above

The empirical formula of the compound that is formed is PO3.

We have to note that the empirical formula can be said to be the simplest formula of the substance that is under consideration. In this case the question said that we have to find the empirical formula of the compound that is formed.

The mass of oxygen is 2.84−1.24 = 1.60g

                                                  P                           O

Combining mass                   1.24g                       1.60g

No. of moles of atoms -   1.24/31= 0.04                 1.60/16= 0.10

Ratio of moles                                1                         2.5

Thus the empirical formula of the compound is PO3

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C o ( H 2 ​ O ) 6 2 + ​ + 4 C l − ⇌ C o C l 4 2 − ​ + 6 H 2 ​ O Cobalt (Equilibrium equation).

Is indeed a circumstance in which the with forward backward reactions occur at the same rate.

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Chemical change is classified as spontaneous reaction when the reaction occurs  without the addition of energy.

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

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Answer:

option C two organisms with desired traits are bred

Answer:

Power

Explanation:

#platofam

Answer:

1280.27 g

Explanation:

Pressure = 22 mmHg / 760 = 0.0289 atm (Converting to atm by dividing by 760)

Volume = 2.7 L

Temperature = 31 ∘C + 273 = 304 K

Mass = ?

Using the ideal gas equation;

PV = nRT

n = RT / PV = 0.0821 * 304 / ( 0.0289 * 2.7)

n = 319.86 mol

Mass = Number of moles * Molar mass

Mass = 319.86  * 4.002602

Mass = 1280.27 g

You do not have to worry  because it will not affect the yield of the pure crystals.

Re-crystallization is the process of obtaining pure crystals from a super saturated solution.

This is done by heating a solution of the impure substance to a high temperature and then allowing the hot solution to cool down and the crystals begin to appear.

You do not have to worry about sudden vigorous boiling of crystal solution when you add the second solvent to the solution because it will not affect the yield of the pure crystals.

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Answer:

It has a chemical called cinnamaldehyde in it and cinnamaldehyde is a skin irritant

Explanation:

Answer:

Because something that experiences change in magnitude or the direction of the velocity is said to be acceleration .

Explanation: